Feed trough for grading machines



he 11, 1940. O; F EFELD 2,204,480

FEED TROUGH FOR GRADING MACHINES Filed Dec. 2, 1938 /n ven for 25 The accompanying drawing illustrates byway Patented June 1 1, 194() A UNITED v STATES,

PATENT. ormer:

, 2,204,480 FEED TROUGH FOR GRADING MACHINES Otto Fesefeldt, Elmshorn, Germany, assignor to v Kommandit-Gesellschaft in Firma Peter Kolln,

Elmshorn, Germany Application December 2, 1938, Serial No. 243,645

In Germany June 20, 1938 v s 2 Claims. (;.209-497) This invention relates to a feed trough forgrading machines, in which the preliminarily treated individual grainspas's from the trough into chambers of a sorting table carrying out a 5 rocking motion.

r In the known types of grading machines the specifically lightest, or unhusked, grains which possess also the greatest elasticity jump farthest,

due to the rocking motion of the sorting table,

7 l0 and collect toward the ends of the trough, where-' by uniformdistribution of the material to the chambers is prevented. Furthermore, as the" known troughs have a perfectly smooth bottom,

. the material contained within them is thoroughly shaken during the motion of the table.

According to the invention, these drawbacks areovercome by providing the trough with a stepped insertion which insures continual up- Ward motion of the individual grains atvery slight vibration, in consequence whereof separation of the lighter from the heavier grains is prevented in. the trough and the grains pass in a perfectly uniform manner into the chambers disposed underneath the trough; s

of example one form of the invention. In the drawing Figurel is a vertical longitudinal section ofa' trough according to theinvention on the line II, of Fig. 2, and a Fig. 2 is a plan thereof.- v One-half of the troughlike box a is provided with a stepped path b, b, and the other half has I a smooth bottom 1. Both the path b, b and the bottom f are preferably lined with tin plate to eliminate resistances which couldobstruct thetravel'of the grain. Toward the center of the I trough a the stepped path b, b" is limited by sawlike sheets 0 adapted to the steps and capable; of being displaced by means of the slots and pins d in such manner that they can occupy a higher or lower position in horizontal direction as well as toward each side in an obliquely ascending manner. The lateral openings e of the trough b, b's erve as outlets for the material which enters .through the inlet 9".

The modeof operation isas follows: a Owing to the shaking motion of the trough a 5 secured to a grading machine the grain entering at g is distributed over the steps b, b" toward both sides of the trough a. The sawlike sheets 0 limiting the steps b, b are then so adjusted that a uniform stream of grain flows over the steps b, b 10 up to-the outletse disposedto'the right and left at "the ends of the trough a. Being mounted approximately in the center of the grading inachine and, owing to the construction thereof,

placed in an inclined position, the; trough a l5 slightly inclines toward the front side, so that .during the shakingof the machine in the longitudinal direction of the trough the grain tends to travel on the steps b, b" along the sawlike sheets 0 and drops over the sawlikeprongs of the sheets c 20 into the front half of the trough'a' where it collects at the apertured front wall'of the trough a until it passes through one of the-apertures e .whlch lead into the chambers of the grading machine. 25

I claim: I 1. A' feed trough for sorting apparatus comprising, a trough-like box, means providing a series of steps arranged longitudinally of the box,

ing apertures providing outlets for (the granular material. 1 1

2. Apparatus according to claim 1 wherein the 40 sheet means is adjustable with respect to the steps; o U 1 Y OTTO FESE FELDT. 

